Siemens 611-D, 840C 6040 DL 20 6041 DR 20

09.95 8 PLC Machine Data (PLC MD)

8.5 PLC MD for the operating system (system bits)

6040

DL 20 DR 9 DL 9 DR 8 DL 8 DR7 DL 7 DR 6 DL 6

6041

DR 20 DR 11 DL 11 DR 10 DL 10

PLC MD

DB63

DW No.

Bit No.

76543210

Signal channel DB

Default value: All bits default to 0

Bit = 0 The system software does not evaluate the bits in the corresponding interface

byte for operational messages.

Bit = 1 The system software evaluates the bits in the corresponding interface byte for

operational messages.

Notes:

1) The bit applies to all NC channels.

2) If the same bit is also set for error messages (PLC MD 6032, 6033), the PLC goes into the

Stop loop.

Sample application:

DB 10 D 6.8 1 signal operational message 6000;

PLC MD 6040.0= 1

See PLC Installation Section.

8–19

SINUMERIK 840C (IA)